There are a number of commercially available balsa strippers
available, but most involve the use of a thick blade such as Exacto #11
as cutter. I found home fabricated strippers using fixed thin razor blades
to work well and give a more precise cut.I have made up a selection of them to cut various sized
strips. I use basswood of the required thickness as a base
and glue on the razor blades at about 60 degrees to the line of the cut.
A cap strip of basswood is then glued on to secure the blade.Various strippers can be made up to cater for different
heights of strips.